code: def test_main_function_random_dmp(self) -> None:
      with tempfile.TemporaryDirectory() as tmpdir:
          lc = LaunchConfig(
              min_nodes=1,
              max_nodes=1,
              nproc_per_node=2,
              run_id=str(uuid.uuid4()),
              rdzv_backend="c10d",
              rdzv_endpoint=os.path.join(tmpdir, "rdzv"),
              rdzv_configs={"store_type": "file"},
              start_method="spawn",
              monitor_interval=1,
              max_restarts=0,
          )
          elastic_launch(
              config=lc, entrypoint=self._run_trainer_random_dmp
          )()
  
file_path: torchrec/examples/bert4rec/tests/test_bert4rec_main.py
imports: import os
  import tempfile
  import unittest
  import uuid
  import torch
  from torch.distributed.launcher.api import elastic_launch, LaunchConfig
  from torchrec import test_utils
  from ..bert4rec_main import main
label_desc: Use image node_id 8 for calling the MainTest obj's underlying member method code with example usage: obj.test_main_function_random_dmp() without return types